v0.1.6.1 - SUNDIALS version updated to v7.2.0

• Disabled parallel make
• Added Github actions for building r-wasm binary

v0.1.6 - SUNDIALS version updated to v7.2.0

• Updated the upstream SUNDIALS to version 7.2.0
• Complete overall of the build system to use cmake based installation

v0.1.5 SUNDIALS version updated to v7.1.1

Changed the backend SUNDIALS library to v7.1.1.

Fixed a bug in setting absolute tolerances

Fixed the pkgdown site.

v0.1.4.2 SUNDIALS version updated to v7.0.0

Changed the backend SUNDIALS library to v7.0.0

v0.1.4.1: total downloads badge added

Added badge for total downloads in README